Go out to your car and pull away at about 5mph. Brake and if it makes loads of grinding noises and the car keeps going the brake pad belongs to you. If it stops as you would normally expect it belongs to someone else.
How are you going to pop round to the garage, in your car so they can check the brakes?
Some people on here do have experience of car maintenance and unless your car is making horrible noises as you try to brake and its having no effect then the brake pad is not yours.